Re: shielding
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Jean wrote:
> I bought a meter recently, as I've already told. So, little story : > I use a piece of shielding curtain hanged on the window. It is very > funny. On one spot behing the shielding it can read 20 more uW than > on another spot 30 cm apart also behind the shielding curtain. > > Shivani replies: My Electrosmog Detector clearly shows similar variations in signal, both inside our house and out. One thing to be aware of is that a signal froma tower is not uniform in strength in all directions to begin with, so that houses at the same distance from it, but at different points on a circle drawn around the tower, will not receive the same signal strength. Then, trees, buildings, etc. block signal. Even a branch waving on a tree in your yard can vary how the signal will enter your window. And in winter when the leaves have fallen, you will be more exposed. If there are two or more signals involved, especially if they come from different directions, there will be hot spots ("nodes," as was pointed out by Charles) where they meet. In addition, all these signals will be reflected by various metals in your house, creating more signal beams. Also, if your TV antenna or wiring are picking up signals, they will then broadcast them into the living space of the house. Yeesh? Shivani [Non-text portions of this message have been removed] |
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How significant are TV antennae at picking up e-m radiation at non-TV
frequencies? We tried taking our TV aerial down but didn't notice any real difference. Incidentally, when two beams overlap, the "nodes" referred to by Charles and Shivani can be an "interference pattern", with alternating high and low intensities a short distance apart, caused by transverse waves at different points in their cycle either reinforcing each other or cancelling each other out. Ian _____ From: [hidden email] [mailto:[hidden email]] On Behalf Of [hidden email] Sent: 19 January 2006 17:38 To: [hidden email] Subject: [eSens] Re: shielding My Electrosmog Detector clearly shows similar variations in signal, both inside our house and out. One thing to be aware of is that a signal from a tower is not uniform in strength in all directions to begin with, so that houses at the same distance from it, but at different points on a circle drawn around the tower, will not receive the same signal strength. Then, trees, buildings, etc. block signal. Even a branch waving on a tree in your yard can vary how the signal will enter your window. And in winter when the leaves have fallen, you will be more exposed. If there are two or more signals involved, especially if they come from different directions, there will be hot spots ("nodes," as was pointed out by Charles) where they meet. In addition, all these signals will be reflected by various metals in your house, creating more signal beams. Also, if your TV antenna or wiring are picking up signals, they will then broadcast them into the living space of the house. Yeesh? Shivani [Non-text portions of this message have been removed] SPONSORED LINKS Health <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness&w1=Health+and+welln ess&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health+prom otion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+welln ess&c=6&s=187&.sig=lYI8B8UF6O4ROok_KpWbMQ> and wellness Health <http://groups.yahoo.com/gads?t=ms&k=Health+wellness+product&w1=Health+and+w ellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health+ promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+w ellness&c=6&s=187&.sig=7FG7KpKu_ab8sI-sfGXbBw> wellness product Health <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness+program&w1=Health+a nd+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Hea lth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+heal th+wellness&c=6&s=187&.sig=SdRoxwZKC3KlEgk4EdZDpQ> and wellness program Health <http://groups.yahoo.com/gads?t=ms&k=Health+promotion+and+wellness&w1=Health +and+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=H ealth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+he alth+wellness&c=6&s=187&.sig=2N5rUTc4fwFZmwqyTa-mLw> promotion and wellness Health <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness+promotion&w1=Health +and+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=H ealth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+he alth+wellness&c=6&s=187&.sig=TWFLmBa9J_P4FmW0xiOmnw> and wellness promotion Business <http://groups.yahoo.com/gads?t=ms&k=Business+health+wellness&w1=Health+and+ wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health +promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+ wellness&c=6&s=187&.sig=cq8JlfksEGFMRzKQ0DoSOA> health wellness _____ YAHOO! GROUPS LINKS * Visit your group "eSens <http://groups.yahoo.com/group/eSens> " on the web. * To unsubscribe from this group, send an email to: [hidden email] <mailto:[hidden email]?subject=Unsubscribe> * Your use of Yahoo! Groups is subject to the Yahoo! <http://docs.yahoo.com/info/terms/> Terms of Service. _____ [Non-text portions of this message have been removed] |
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In reply to this post by SArjuna
--- In [hidden email], "Ian Kemp" <ianandsue.kemp@u...> wrote:
> > How significant are TV antennae at picking up e-m radiation at non- TV > frequencies? We tried taking our TV aerial down but didn't notice any real > difference. > > > > Incidentally, when two beams overlap, the "nodes" referred to by Charles and > Shivani can be an "interference pattern", with alternating high and low > intensities a short distance apart, caused by transverse waves at different > points in their cycle either reinforcing each other or cancelling each other > out. > > > > Ian It just give me the idea of another thing to measure. Now in my case the phone tri mast, my window is parallel to one side of the triangle (I assume, although not sure). That means I would get two lobes more or less equally, although once again not sure. Yes, depending of the exact distance, and different signal from each mast, ... sinusoidal variation, ... Although I'm not sure that in the average if I keep the meter at the same point a while, 20 uW of difference is a lot. I get something like 15uW in one points and 35 uW 30cm apart. Anybody has the exact math theory ? I don't have anything between the window and the mast it's too high for the trees. jean. |
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In reply to this post by SArjuna
>
> Jean wrote: > > I bought a meter recently, as I've already told. So, little story : --- In [hidden email], "charles" <charles@m...> wrote: > > That is not uncommon. > One has to consider measuring techniques. > - How fas was your meter away from the curtain? If you are too close, you > may pick-up some electrical fields from the curtain. > - Was the angle at which you measured the same? > - Didn't you catch a reflection from somewhere else? > - Was the meter on the second spot perhaps in a *hotspot* ? > > Measuring is not holding a meter and pressing a button. > One has to take in consideration all kind of possible influences, like > reflections. > > Greetings, > Charles Claessens It is 1.3 meter from the curtain. the angle is the same, cause I have the triangular antenna. Possible explanation also : the curtain is not regularly folded, there are not in fact nice folds, it is stretched (1.70m width out of a curtain width measure of 2.5m to give an idea). It's interesting once again what you say about the curtain. The mast frequency I pick is the GSM around 900 Mhz. I'll do more tests later. jean. |
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In reply to this post by SArjuna
--- In [hidden email], SArjuna@a... wrote:
> My Electrosmog Detector clearly shows similar variations in signal, both > inside our house and out. One thing to be aware of is that a signal from a > tower is not uniform in strength in all directions to begin with, so that > houses at the same distance from it, but at different points on a circle drawn > around the tower, will not receive the same signal strength. > Then, trees, buildings, etc. block signal. Even a branch waving on a > tree in your yard can vary how the signal will enter your window. And in > winter when the leaves have fallen, you will be more exposed. > If there are two or more signals involved, especially if they come from > different directions, there will be hot spots ("nodes," as was pointed out by > Charles) where they meet. > In addition, all these signals will be reflected by various metals in > your house, creating more signal beams. > Also, if your TV antenna or wiring are picking up signals, they will > then broadcast them into the living space of the house. > Yeesh? > > Shivani Okay for the possible interference between two emitting sources, it's possible. I'll do more measuring later. Yeah, there is lots of possible explanation, I'm gonna try to understand that a little bit more. There can be a drop of 30 uW by moving very little the meter. jean. |
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Hello Jean,
since your meter lacks a schielding inside for the antenna bus, it is quite possible, that you come with your meter inside a hotspot, and that therefore your meter gives another value. But, if I were you, don't worry. Itbis important, that you can measure, at the same spot, with and without your shielding curtain. It is also possible, that you measure a reflection coming from behind you, iand relecting in the curtain. Greetings, Charles Claessens member Verband Baubiologie www.milieuziektes.nl www.milieuziektes.be www.hetbitje.nl checked by Norton Antivirus ----- Original Message ----- From: "jean" <[hidden email]> To: <[hidden email]> Sent: Thursday, January 19, 2006 21:14 Subject: [eSens] Re: shielding > --- In [hidden email], SArjuna@a... wrote: >> My Electrosmog Detector clearly shows similar variations in > signal, both >> inside our house and out. One thing to be aware of is that a > signal from a >> tower is not uniform in strength in all directions to begin with, > so that >> houses at the same distance from it, but at different points on a > circle drawn >> around the tower, will not receive the same signal strength. >> Then, trees, buildings, etc. block signal. Even a branch > waving on a >> tree in your yard can vary how the signal will enter your window. > And in >> winter when the leaves have fallen, you will be more exposed. >> If there are two or more signals involved, especially if they > come from >> different directions, there will be hot spots ("nodes," as was > pointed out by >> Charles) where they meet. >> In addition, all these signals will be reflected by various > metals in >> your house, creating more signal beams. >> Also, if your TV antenna or wiring are picking up signals, > they will >> then broadcast them into the living space of the house. >> Yeesh? >> >> Shivani > > Okay for the possible interference between two emitting sources, it's > possible. I'll do more measuring later. Yeah, there is lots of > possible explanation, I'm gonna try to understand that a little bit > more. > > There can be a drop of 30 uW by moving very little the meter. > > jean. > |
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In reply to this post by Jean-2
The theory of interference patterns is that one could get down to a complete
zero signal at the "antinode" and double the original signal at a "node". However a meter may not be able to measure a location that accurately. And I am only guessing that it is a true interference pattern; local variations can be caused by other effects e.g. reflection, partial blockage, trees etc., as others correctly said previously. Ian _____ From: [hidden email] [mailto:[hidden email]] On Behalf Of jean Sent: 19 January 2006 19:52 To: [hidden email] Subject: [eSens] Re: shielding --- In [hidden email], "Ian Kemp" <ianandsue.kemp@u...> wrote: > Incidentally, when two beams overlap, the "nodes" referred to by Charles and Shivani can be an "interference pattern", with alternating high and low intensities a short distance apart, caused by transverse waves at different points in their cycle either reinforcing each other or cancelling each other out. > > Ian Yes, depending of the exact distance, and different signal from each mast, ... sinusoidal variation, ... Although I'm not sure that in the average if I keep the meter at the same point a while, 20 uW of difference is a lot. I get something like 15uW in one points and 35 uW 30cm apart. Anybody has the exact math theory ? I don't have anything between the window and the mast it's too high for the trees. jean. SPONSORED LINKS Health <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness&w1=Health+and+welln ess&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health+prom otion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+welln ess&c=6&s=187&.sig=lYI8B8UF6O4ROok_KpWbMQ> and wellness Health <http://groups.yahoo.com/gads?t=ms&k=Health+wellness+product&w1=Health+and+w ellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health+ promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+w ellness&c=6&s=187&.sig=7FG7KpKu_ab8sI-sfGXbBw> wellness product Health <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness+program&w1=Health+a nd+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Hea lth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+heal th+wellness&c=6&s=187&.sig=SdRoxwZKC3KlEgk4EdZDpQ> and wellness program Health <http://groups.yahoo.com/gads?t=ms&k=Health+promotion+and+wellness&w1=Health +and+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=H ealth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+he alth+wellness&c=6&s=187&.sig=2N5rUTc4fwFZmwqyTa-mLw> promotion and wellness Health <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness+promotion&w1=Health +and+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=H ealth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+he alth+wellness&c=6&s=187&.sig=TWFLmBa9J_P4FmW0xiOmnw> and wellness promotion Business <http://groups.yahoo.com/gads?t=ms&k=Business+health+wellness&w1=Health+and+ wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health +promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+ wellness&c=6&s=187&.sig=cq8JlfksEGFMRzKQ0DoSOA> health wellness _____ YAHOO! GROUPS LINKS * Visit your group "eSens <http://groups.yahoo.com/group/eSens> " on the web. * To unsubscribe from this group, send an email to: [hidden email] <mailto:[hidden email]?subject=Unsubscribe> * Your use of Yahoo! Groups is subject to the Yahoo! <http://docs.yahoo.com/info/terms/> Terms of Service. _____ [Non-text portions of this message have been removed] |
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In reply to this post by SArjuna
Hi,
Before i would feel "thrown" by the sattelite dish or something (the cable to it or the back of the tv, or the box) just everytime i walked there.. At that time I used more tachyon disks there. Now i usually have one disk trying to cover the lot (very intuitive). It gives me no problem now, with or without tachyon// Maybe they cut a tree up the road, or well, not much bothers me anymore now. To Light alone I bow Love Ian Kemp <[hidden email]> wrote: Thanks Charles. Interesting about the satellite dish, Sue has felt she was being "zapped" in our front garden and we had tentatively ascribed that to next door's satellite dish, about 5m away. (Houses are pretty closely packed where we are!) Ian _____ From: [hidden email] [mailto:[hidden email]] On Behalf Of charles Sent: 19 January 2006 21:43 To: [hidden email] Subject: Fw: [eSens] Re: shielding ----- Original Message ----- From: "milieuziektes.skynet" <[hidden email]> To: <[hidden email]> Sent: Thursday, January 19, 2006 20:15 Subject: Re: [eSens] Re: shielding > Hello Ian, > > all metal surfaces can pick-up e-m radiation and transmit it further. > A TV antenna is not a big surface, so that would not be serious. > > However, I have experienced, that from the back of a satellite dish, some > longitudinal waves came through, which hindered an electrosensitive woman. > After dismantling the dish, the complaints were gone. > > Hotspots are just concentrations of all kinds of high frequency fields, > and they may have the size of a football, and are of higher densities than > in other places in the room. > Especially on the beds, it is annoying. > We measure them also in the living room, on chairs where people sit > longtimes. > We have a special magnetic antenna for that. > > Greetings, > Charles Claessens > member Verband Baubiologie > www.milieuziektes.nl > www.milieuziektes.be > www.hetbitje.nl > checked by Norton Antivirus > > > > > ----- Original Message ----- > From: "Ian Kemp" <[hidden email]> > To: <[hidden email]> > Sent: Thursday, January 19, 2006 19:05 > Subject: RE: [eSens] Re: shielding > > >> How significant are TV antennae at picking up e-m radiation at non-TV >> frequencies? We tried taking our TV aerial down but didn't notice any >> real >> difference. >> >> >> >> Incidentally, when two beams overlap, the "nodes" referred to by Charles >> and >> Shivani can be an "interference pattern", with alternating high and low >> intensities a short distance apart, caused by transverse waves at >> different >> points in their cycle either reinforcing each other or cancelling each >> other >> out. >> >> >> >> Ian >> >> >> >> _____ >> >> From: [hidden email] [mailto:[hidden email]] On Behalf Of >> [hidden email] >> Sent: 19 January 2006 17:38 >> To: [hidden email] >> Subject: [eSens] Re: shielding >> >> >> >> My Electrosmog Detector clearly shows similar variations in signal, >> both >> inside our house and out. One thing to be aware of is that a signal >> from >> a >> tower is not uniform in strength in all directions to begin with, so that >> houses at the same distance from it, but at different points on a circle >> drawn >> around the tower, will not receive the same signal strength. >> Then, trees, buildings, etc. block signal. Even a branch waving on >> a >> >> tree in your yard can vary how the signal will enter your window. And >> in >> winter when the leaves have fallen, you will be more exposed. >> If there are two or more signals involved, especially if they come >> from >> >> different directions, there will be hot spots ("nodes," as was pointed >> out >> by >> Charles) where they meet. >> In addition, all these signals will be reflected by various metals in >> your house, creating more signal beams. >> Also, if your TV antenna or wiring are picking up signals, they will >> then broadcast them into the living space of the house. >> Yeesh? >> >> Shivani >> >> >> >> [Non-text portions of this message have been removed] >> >> >> >> >> SPONSORED LINKS >> >> >> Health >> <http://groups.yahoo.com/gads?t=ms > &k=Health+and+wellness&w1=Health+and+welln >> ess&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health+prom >> otion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+welln >> ess&c=6&s=187&.sig=lYI8B8UF6O4ROok_KpWbMQ> and wellness >> >> Health >> <http://groups.yahoo.com/gads?t=ms <http://groups.yahoo.com/gads?t=ms&k=Health+wellness+product&w1=Health+and+w > &k=Health+wellness+product&w1=Health+and+w >> ellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health+ >> promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+w >> ellness&c=6&s=187&.sig=7FG7KpKu_ab8sI-sfGXbBw> wellness product >> >> Health >> <http://groups.yahoo.com/gads?t=ms <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness+program&w1=Health+a > &k=Health+and+wellness+program&w1=Health+a >> nd+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Hea >> lth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+heal >> th+wellness&c=6&s=187&.sig=SdRoxwZKC3KlEgk4EdZDpQ> and wellness program >> >> >> Health >> <http://groups.yahoo.com/gads?t=ms <http://groups.yahoo.com/gads?t=ms&k=Health+promotion+and+wellness&w1=Health > &k=Health+promotion+and+wellness&w1=Health >> +and+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=H >> ealth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+he >> alth+wellness&c=6&s=187&.sig=2N5rUTc4fwFZmwqyTa-mLw> promotion and >> wellness >> >> >> Health >> <http://groups.yahoo.com/gads?t=ms <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness+promotion&w1=Health > &k=Health+and+wellness+promotion&w1=Health >> +and+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=H >> ealth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+he >> alth+wellness&c=6&s=187&.sig=TWFLmBa9J_P4FmW0xiOmnw> and wellness >> promotion >> >> >> Business >> <http://groups.yahoo.com/gads?t=ms <http://groups.yahoo.com/gads?t=ms&k=Business+health+wellness&w1=Health+and+ > &k=Business+health+wellness&w1=Health+and+ >> wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health >> +promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+ >> wellness&c=6&s=187&.sig=cq8JlfksEGFMRzKQ0DoSOA> health wellness >> >> >> >> _____ >> >> YAHOO! GROUPS LINKS >> >> >> >> * Visit your group "eSens <http://groups.yahoo.com/group/eSens> " on >> the web. >> >> * To unsubscribe from this group, send an email to: >> [hidden email] >> <mailto:[hidden email]?subject=Unsubscribe> >> >> * Your use of Yahoo! Groups is subject to the Yahoo! >> <http://docs.yahoo.com/info/terms/> Terms of Service. >> >> >> >> _____ >> >> >> >> [Non-text portions of this message have been removed] >> >> >> >> >> Yahoo! Groups Links >> >> >> >> >> >> >> >> > > > SPONSORED LINKS Health <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness&w1=Health+and+welln ess&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health+prom otion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+welln ess&c=6&s=187&.sig=lYI8B8UF6O4ROok_KpWbMQ> and wellness Health <http://groups.yahoo.com/gads?t=ms&k=Health+wellness+product&w1=Health+and+w ellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health+ promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+w ellness&c=6&s=187&.sig=7FG7KpKu_ab8sI-sfGXbBw> wellness product Health <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness+program&w1=Health+a nd+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Hea lth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+heal th+wellness&c=6&s=187&.sig=SdRoxwZKC3KlEgk4EdZDpQ> and wellness program Health <http://groups.yahoo.com/gads?t=ms&k=Health+promotion+and+wellness&w1=Health +and+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=H ealth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+he alth+wellness&c=6&s=187&.sig=2N5rUTc4fwFZmwqyTa-mLw> promotion and wellness Health <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness+promotion&w1=Health +and+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=H ealth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+he alth+wellness&c=6&s=187&.sig=TWFLmBa9J_P4FmW0xiOmnw> and wellness promotion Business <http://groups.yahoo.com/gads?t=ms&k=Business+health+wellness&w1=Health+and+ wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health +promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+ wellness&c=6&s=187&.sig=cq8JlfksEGFMRzKQ0DoSOA> health wellness _____ YAHOO! GROUPS LINKS * Visit your group "eSens <http://groups.yahoo.com/group/eSens> " on the web. * To unsubscribe from this group, send an email to: [hidden email] <mailto:[hidden email]?subject=Unsubscribe> * Your use of Yahoo! Groups is subject to the Yahoo! <http://docs.yahoo.com/info/terms/> Terms of Service. _____ [Non-text portions of this message have been removed] SPONSORED LINKS Health and wellness Health wellness product Health and wellness program Health promotion and wellness Health and wellness promotion Business health wellness --------------------------------- YAHOO! GROUPS LINKS Visit your group "eSens" on the web. To unsubscribe from this group, send an email to: [hidden email] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. --------------------------------- --------------------------------- Yahoo! Photos Ring in the New Year with Photo Calendars. Add photos, events, holidays, whatever. [Non-text portions of this message have been removed] |
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In reply to this post by SArjuna
thanks for the answer. I'm still trying to figure out more about
this question. Interferences, signal recombination, ugh. It's messy physics. It might be interference between two masts, cause I'm really facing the masts without anything in between. And there are big variations just moving the meter 30 cm, and pointing in the same direction. jean. --- In [hidden email], "Ian Kemp" <ianandsue.kemp@u...> wrote: > > The theory of interference patterns is that one could get down to a complete > zero signal at the "antinode" and double the original signal at a "node". > However a meter may not be able to measure a location that accurately. And > I am only guessing that it is a true interference pattern; local variations > can be caused by other effects e.g. reflection, partial blockage, trees > etc., as others correctly said previously. > > Ian > > > > _____ > > From: [hidden email] [mailto:[hidden email]] On Behalf Of jean > Sent: 19 January 2006 19:52 > To: [hidden email] > Subject: [eSens] Re: shielding > > > > --- In [hidden email], "Ian Kemp" <ianandsue.kemp@u...> wrote: > > > Incidentally, when two beams overlap, the "nodes" referred to by > Charles and Shivani can be an "interference pattern", with alternating high > and > low intensities a short distance apart, caused by transverse waves at > different points in their cycle either reinforcing each other or cancelling > each other out. > > > > Ian > > > Yes, depending of the exact distance, and different signal from each > mast, ... sinusoidal variation, ... Although I'm not sure that in > the average if I keep the meter at the same point a while, 20 uW of > difference is a lot. I get something like 15uW in one points and 35 > uW 30cm apart. Anybody has the exact math theory ? I don't have > anything between the window and the mast it's too high for the trees. > > jean. > > > > > > |
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Hello Jean,
it is not the interference with two masts. It is just so that you enter a hotspot. The reflections may come from many directions, not related to the two mastst. Greetings, Charles Claessens member Verband Baubiologie www.milieuziektes.nl www.milieuziektes.be www.hetbitje.nl checked by Norton Antivirus ----- Original Message ----- From: "jean" <[hidden email]> To: <[hidden email]> Sent: Friday, January 20, 2006 10:46 Subject: [eSens] Re: shielding > thanks for the answer. I'm still trying to figure out more about > this question. Interferences, signal recombination, ugh. It's messy > physics. It might be interference between two masts, cause I'm > really facing the masts without anything in between. And there are > big variations just moving the meter 30 cm, and pointing in the same > direction. > > jean. > > --- In [hidden email], "Ian Kemp" <ianandsue.kemp@u...> wrote: >> >> The theory of interference patterns is that one could get down to a > complete >> zero signal at the "antinode" and double the original signal at > a "node". >> However a meter may not be able to measure a location that > accurately. And >> I am only guessing that it is a true interference pattern; local > variations >> can be caused by other effects e.g. reflection, partial blockage, > trees >> etc., as others correctly said previously. >> >> Ian >> >> >> >> _____ >> >> From: [hidden email] [mailto:[hidden email]] On > Behalf Of jean >> Sent: 19 January 2006 19:52 >> To: [hidden email] >> Subject: [eSens] Re: shielding >> >> >> >> --- In [hidden email], "Ian Kemp" <ianandsue.kemp@u...> > wrote: >> >> > Incidentally, when two beams overlap, the "nodes" referred to by >> Charles and Shivani can be an "interference pattern", with > alternating high >> and >> low intensities a short distance apart, caused by transverse waves > at >> different points in their cycle either reinforcing each other or > cancelling >> each other out. >> > >> > Ian >> >> >> Yes, depending of the exact distance, and different signal from > each >> mast, ... sinusoidal variation, ... Although I'm not sure that in >> the average if I keep the meter at the same point a while, 20 uW of >> difference is a lot. I get something like 15uW in one points and > 35 >> uW 30cm apart. Anybody has the exact math theory ? I don't have >> anything between the window and the mast it's too high for the > trees. >> >> jean. >> >> >> >> >> >> > > > > > > > > > Yahoo! Groups Links > > > > > > > |
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In reply to this post by SArjuna
Hello Ian,
with my meter I can determine exactly where those hotspots are. They mostly do have the dimension of a small football. Greetings, Charles Claessens member Verband Baubiologie www.milieuziektes.nl www.milieuziektes.be www.hetbitje.nl checked by Norton Antivirus ----- Original Message ----- From: "Ian Kemp" <[hidden email]> To: <[hidden email]> Sent: Friday, January 20, 2006 01:32 Subject: RE: [eSens] Re: shielding > The theory of interference patterns is that one could get down to a > complete > zero signal at the "antinode" and double the original signal at a "node". > However a meter may not be able to measure a location that accurately. > And > I am only guessing that it is a true interference pattern; local > variations > can be caused by other effects e.g. reflection, partial blockage, trees > etc., as others correctly said previously. > > Ian > > > > _____ > > From: [hidden email] [mailto:[hidden email]] On Behalf Of > jean > Sent: 19 January 2006 19:52 > To: [hidden email] > Subject: [eSens] Re: shielding > > > > --- In [hidden email], "Ian Kemp" <ianandsue.kemp@u...> wrote: > >> Incidentally, when two beams overlap, the "nodes" referred to by > Charles and Shivani can be an "interference pattern", with alternating > high > and > low intensities a short distance apart, caused by transverse waves at > different points in their cycle either reinforcing each other or > cancelling > each other out. >> >> Ian > > > Yes, depending of the exact distance, and different signal from each > mast, ... sinusoidal variation, ... Although I'm not sure that in > the average if I keep the meter at the same point a while, 20 uW of > difference is a lot. I get something like 15uW in one points and 35 > uW 30cm apart. Anybody has the exact math theory ? I don't have > anything between the window and the mast it's too high for the trees. > > jean. > > > > > > > > > > SPONSORED LINKS > > > Health > <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness&w1=Health+and+welln > ess&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health+prom > otion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+welln > ess&c=6&s=187&.sig=lYI8B8UF6O4ROok_KpWbMQ> and wellness > > Health > <http://groups.yahoo.com/gads?t=ms&k=Health+wellness+product&w1=Health+and+w > ellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health+ > promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+w > ellness&c=6&s=187&.sig=7FG7KpKu_ab8sI-sfGXbBw> wellness product > > Health > <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness+program&w1=Health+a > nd+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Hea > lth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+heal > th+wellness&c=6&s=187&.sig=SdRoxwZKC3KlEgk4EdZDpQ> and wellness program > > > Health > <http://groups.yahoo.com/gads?t=ms&k=Health+promotion+and+wellness&w1=Health > +and+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=H > ealth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+he > alth+wellness&c=6&s=187&.sig=2N5rUTc4fwFZmwqyTa-mLw> promotion and > wellness > > > Health > <http://groups.yahoo.com/gads?t=ms&k=Health+and+wellness+promotion&w1=Health > +and+wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=H > ealth+promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+he > alth+wellness&c=6&s=187&.sig=TWFLmBa9J_P4FmW0xiOmnw> and wellness > promotion > > > Business > <http://groups.yahoo.com/gads?t=ms&k=Business+health+wellness&w1=Health+and+ > wellness&w2=Health+wellness+product&w3=Health+and+wellness+program&w4=Health > +promotion+and+wellness&w5=Health+and+wellness+promotion&w6=Business+health+ > wellness&c=6&s=187&.sig=cq8JlfksEGFMRzKQ0DoSOA> health wellness > > > > _____ > > YAHOO! GROUPS LINKS > > > > * Visit your group "eSens <http://groups.yahoo.com/group/eSens> " on > the web. > > * To unsubscribe from this group, send an email to: > [hidden email] > <mailto:[hidden email]?subject=Unsubscribe> > > * Your use of Yahoo! Groups is subject to the Yahoo! > <http://docs.yahoo.com/info/terms/> Terms of Service. > > > > _____ > > > > [Non-text portions of this message have been removed] > > > > > Yahoo! Groups Links > > > > > > > > |
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